sp_compliance_field_masking able to search for LastName in cleartext

The test https://git.eliatra.com/eliatra-suite/eliatra-opensearch-integration-tests/-/blob/rename-basics/test/_testsuite_compliance_2/test_compliance_field_masking.sh#L19 failed with following error:

--------------------- Test LastName Search with field masking ------------
sp_compliance_field_masking able to search for LastName in cleartext. Result was 1, Raw response was {
  "took" : 9,
  "timed_out" : false,
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 1,
      "relation" : "eq"
    },
    "max_score" : 5.857933,
    "hits" : [
      {
        "_index" : "humanresources",
        "_id" : "1",
        "_score" : 5.857933,
        "_source" : {
          "FirstName" : "298a31bfc228c9d54a4bc10bf3132f5c0fd469a3ae0edf438550920c77f3bb6a",
          "LastName" : "538ddd9c3b288fe2c65f9719d2b14b44fb137416ec9de9d44f673cd67e68b7d2",
          "Designation" : "CEO",
          "Salary" : 154000,
          "Address" : "445b90b9787ba5858b11247dc74da69a67a0147d7d57c8b07658ccdf09a13c1e"
        }
      }
    ]
  }
}

and

--------------------- Test LastName Search with field masking ------------
sp_compliance_field_masking able to search for LastName in cleartext. Result was 1, Raw response was {
  "took" : 9,
  "timed_out" : false,
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 1,
      "relation" : "eq"
    },
    "max_score" : 5.857933,
    "hits" : [
      {
        "_index" : "humanresources",
        "_id" : "1",
        "_score" : 5.857933,
        "_source" : {
          "FirstName" : "298a31bfc228c9d54a4bc10bf3132f5c0fd469a3ae0edf438550920c77f3bb6a",
          "LastName" : "538ddd9c3b288fe2c65f9719d2b14b44fb137416ec9de9d44f673cd67e68b7d2",
          "Designation" : "CEO",
          "Salary" : 154000,
          "Address" : "445b90b9787ba5858b11247dc74da69a67a0147d7d57c8b07658ccdf09a13c1e"
        }
      }
    ]
  }
}